Mention couchbase.com in install errors
Mention couchbase.com in install errors

Change-Id: I4950e0ade846f43698f11a86d0d2f983af2553e7
Reviewed-on: http://review.couchbase.org/18967
Tested-by: Sergey Avseyev <87f6d5e4fd3644c3c20800cde7fd3ad1569370b3@gmail.com>
Reviewed-by: Matt Ingenthron <1fa2ef4755a9226cb9a0a4840bd89b158ac71391@couchbase.com>

dewolfe/couchbase-ruby-client,dewolfe/couchbase-ruby-client